Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d7a6546ed4d3cf…

MALICIOUS

PDF

43.4 KB Created: 2020-08-14 15:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e88c58fb9709ad560c498ff83b5b0ae SHA-1: 2f7486fca1aedf7aa256d186be575fa858edcfbe SHA-256: e0d7a6546ed4d3cf1df69ffe738f2f2be6cec20091305314bd18e2e615486a0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Another critical heuristic indicates a PDF link farm, with the primary link leading to a Shopify domain. The document body, though heavily obfuscated, contains text suggesting a 'letter of recommendation' lure, and a high-severity heuristic flags it as an MFA/one-time-code harvesting lure. This indicates a phishing attempt designed to trick users into providing credentials or MFA approval.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=letter+of+recommendation+from+professor+template
    • http://dufepe.justintimeconsultancy.org/uploads/1/3/1/0/131071164/301863077ab436d.pdf
    • http://files.allthingsec.com/uploads/1/3/1/1/131164202/xikefagoja.pdf
    • http://files.alexsarkisian.com/uploads/1/3/1/3/131398054/43a885825b2e523.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/nazolugenivakox.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/83564512312.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/safiwo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/pazeravizibarojevema.pdf
    • https://cdn.shopify.com/s/files/1/0435/8127/6319/files/24331221178.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/20391736987.pdf
    • https://cdn.shopify.com/s/files/1/0429/0412/5599/files/95503197285.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/41922593198.pdf
    • https://cdn.shopify.com/s/files/1/0439/1659/1272/files/69106019625.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/93289936053.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a92.bin
f9dbe5253814321408d801895c9fe0801116a63c431acb2c87a3a076415f9120		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A92 5240 bytes
font_01_sfnt_off00007c4b.bin
6e286b637ae417a6fefeef540e04e7ede1bd0b062a3e42ef77f967a6cc826c13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4B 10740 bytes

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